Pbopelling and steering vessels



(No Model.)

7 2 Sheets-Sheet 1. J. J. KUNSTADTER. PROPELLI-NG AND STEERING VESSEL-S.

Patented July 20, 1886.

WIT/V5885 ATTORNEYS.

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(No Model.) 2 Sheets-Sheet 2.

J. J. KUNSTADTER.

PROPELLING AND STEERING vEssEL s.

No., 345,702. Patented July 20, 1886.

WITNESSES:

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M PETERS. Pbmn-Ulhumyher. Wu'ul kton. D, C.

UNITED STATES PATENT GFFICE.

JACOB J. xuns'riin rnn, on NEW roman. Y.

PROPELLING AND STEERING VESSELS.

SPECIFICATION forming part of Letters Patent No. 345,702, dated July 20,1886.

Application filed November 23, 1885. Serial No. 183,585.

To all whom it may concern.-

Be it known that I, JACOB J. KUNsrIiDTER, of the city, county, and Stateof New York, have invented certainnew and useful Improvements inPropelling and Steering Vessels, of which the following is aspecification.

The vessels which are fitted up with socalled twin propellers have thedisadvantage that they can only be steered with considerable difficulty,as the rotating motion of one of them has to be interrupted when it isdesired to quickly turn the vessel to one side or the other.

The object of this invention is to provide means for effectivelysteeringvessels with twin propellers; and the invention consists inarrangingarudderhavingasteering-propeller intermediately between thetwin screws, said steering-propeller being swivcled to a center shaft bya universal joint, and the center shaft geared with the shafts of bothpropellerscrews.

In the accompanying drawings, Figure 1 represents a bottom view of avessel fitted with twin propellers, and with my improved propelling andsteering device, and Figs. 2 and 3 are a side and an end elevation ofthe same.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents a vessel which is propelled bytwin screws that is to say, by two screws, B B, that are arrangedsymmetrically to the central longigitndinal axis of the vessel. Theshafts B B of the propeller-screws B B are operated by the engine insuch a manner that the motion of either one of them can be interruptedwithout stopping the other. A third or steering (No model.)

the center shaft, O,by a friction-wheel or bevelwheel, a, that gearswith bevel-wheels b b on the shafts B B, or in any other suitablemanner, so that the motion is transmitted to the shaft of thesteering-propeller O by one of the shafts B B, even if the motion of oneof them should be interrupted. The auxiliary shaft 0 of thesteering-propeller O is connected to the center shaft, 0, by a universaljoint, 0, preferably of that construction which is shown in my priorpatent for steering-propellers, dated September 9, 1879, No. 219,405. Bythus arranging a rudder with a steering-propeller intermediately to andat some distance back of the main propelling-screws a more powerfulpropelling action is exerted on the vessel, so that the same is broughtfully within control and capable of turning quickly and within a shortradius, especially as the propelling-screw responds to the action of thesteering-gear and exerts a steering action on the vessel before themotion of either one of the main screws can be interrupted. As soon asthe motion of either main screw is interrupted the motion of the otherscrew will assist in the quick turning of the vessel.

Having thus described my invention, I claim as new and desire to secu reby Letters Patent- The combination of twin propeller-screws and theirshafts, an intermediate center shaft located in line with thelongitudinal axis of the vessel, an auxiliary shaft supported inbearings of the rudder, a universal joint connecting the center andauxiliary shaft, a steering-propeller on said auxiliary shaft, andmotiontransmitting gearing, by which the center shaft is rotated byeither one or both of the main shafts, substantially as set forth.

In testimony that I claim the foregoing as JACOB J. xnnsriin'rnn.

Witnesses: I

PAUL GoErEL, MARTIN PEIRY.

